Shampoo sink



FIG. 1 is a perspective view taken from the top and front of a shampoo sink showing my new design;

FIG. 2 is a perspective view taken from the bottom, front and right side thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and

FIG. 7 is a right side elevational view thereof, the left side being a mirror image of the right side shown. 

The ornamental design for a shampoo sink, substantially as shown and described. 